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Section 26 USB 2.0 Host/Function Module
Page 1448 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
8 SQCLR 0 R/W* Toggle Bit Clear
This bit should be set to 1 to clear the expected
value (to set DATA0 as the expected value) of the
sequence toggle bit for the next transaction of the
pertinent pipe.
0: Invalid
1: Specifies DATA0.
Setting this bit to 1 allows this module to set DATA0
as the expected value of the sequence toggle bit of
the pertinent pipe. This module always sets this bit to
0.
When the host controller function is selected, setting
this bit to 1 for the pipe for bulk OUT transfer, this
module starts the next transfer of the pertinent pipe
with the PING token.
Set the SQCLR bit to 1 while CSSTS is 0 and PID is
NAK.
Before modifying this bit after modifying the PID bits
for the corresponding pipe from BUF to NAK, check
that CSSTS and PBUSY are 0. However, if the PID
bits have been modified to NAK by this module,
checking PBUSY is not necessary.